At each maintenance service of the car check a condition of a protective cover of the steering mechanism, caps of hinges of draughts and density of their landing. Them it is necessary

To replace in the presence of cracks, ruptures and other defects breaking tightness.

THE NOTE

All amplifiers of a steering publish different sounds at work. One of the most widespread sounds is hissing at steering wheel turn on the standing car. This sound is especially well audible at turn of a steering wheel with simultaneous pressing a brake pedal. This sound is not connected at all with working capacity of a steering. Do not replace the distributor if only the hissing sound does not become too loud. The new distributor will publish too weak noise, and malfunction is eliminated by such replacement not in all cases.

Be convinced that at rectilinear position of wheels of the car the steering wheel spoke settles down horizontally. Otherwise define a cause of defect and eliminate it.

Turning for a steering wheel from an emphasis against the stop, check up visually and on hearing the following:

– Reliability of fastening of a steering column, the steering mechanism and a steering wheel;

– Absence of a backlash in резинометаллических hinges and hinges of steering draughts, and also in connections elastic муфты a wheel shaft;

– Reliability of an inhaling and latching of bolts of fastening of bent for the helmsman рейке and nuts of fingers of spherical hinges;

– Absence of jammings and the hindrances interfering turn of a steering wheel.

If knocks and jammings are found out, disconnect cross-section draughts from rotary levers of telescopic racks of a suspension bracket and repeat check. Having convinced that knocks and jammings proceed from a steering, remove it from the car and check up backlash size between an emphasis рейки and a nut. As much as possible admissible backlash between an emphasis and a nut of 0,2 mm. If necessary replace the worn out details and adjust a backlash between an emphasis and a nut.

Check of a free wheeling of a steering wheel

Establish a steering wheel in position of rectilinear movement and start up the engine.

Check up a steering wheel free wheeling on its circle.

The steering wheel free wheeling should be 0–30 mm.

At excess of the specified value check up connections between shaft of a steering and a steering drive.

Check of angles of rotation of wheels

Fig. 5.1. Check of angles of rotation of wheels

Establish the car forward wheels on the rotary stand and check up angles of rotation of wheels (fig. 5.1).

Angle of rotation of wheels (the car without loading):

The internal..... 37°±1°30'

The external..... 33°03'

If angles of rotation of wheels do not correspond to the specified values, adjust it is similar-denie wheels and again check up angles of rotation.

Check of a condition of tips of steering draughts

Check of the moment of resistance проворачиванию fingers of spherical hinges of tips of steering draughts

Fig. 5.2. A detachment of steering draught from a rotary fist

By means of the special adaptation disconnect steering draught from a rotary ku-varnish (fig. 5.2).

Be convinced of absence of an excessive backlash in the spherical hinge of a tip of draught, not-how many time having turned the hinge for a finger circular motions.

Fig. 5.3. Check of the moment of resistance проворачиванию a hinge finger

Wrap a nut of fastening of a finger of the hinge of draught and check up the resistance moment проворачиванию a hinge finger (fig. 5.3), it should be equal 0,5–2,5 Н·м.

If the resistance moment проворачиванию exceeds the specified top limit, replace a tip of steering draught.

If the resistance moment проворачиванию a finger of the hinge less than the specified bottom limit, check up a backlash in the hinge and if necessary replace it.

Check of effort of turn of a steering wheel on the standing car

Put the car on an equal horizontal platform, establish a steering wheel in position of rectilinear movement.

Increase frequency of rotation of a cranked shaft to (1000±100) mines-1.

THE NOTE

After check lower turns of the engine to idling turns.

Fig. 5.4. Check of effort of turn of a steering wheel

By means of spring scales check up effort of turn of a steering wheel, turning it on 1,5 turns in both parties (fig. 5.4).

The effort of turn of a steering wheel to the motionless car should make 29 Н (3,0 кгс).

During steering wheel rotation be convinced of absence of sharp changes of effort.

At the raised effort of turn of a steering wheel execute following checks and adjustments:

– Check up spherical hinges of tips of steering draughts and protective covers on presence of cracks or damages;

– Check up the moment проворачиванияприводной gear wheels of the steering mechanism and spherical hinges of tips of steering draughts;

– The moment проворачивания the spherical hinge.

Check of returning of a steering wheel in position of rectilinear movement

Check up spontaneous returning of a steering wheel on following parametres.

At performance of the moderate or sharp turns effort to a steering wheel and its returning should be identical in the left and right turns.

After steering wheel turn on 90 ° and its keeping within several seconds during car movement for the speed of 35 km/h the released steering wheel should turn not less than on 70 ° towards neutral position.

THE NOTE

At very sharp turn of a steering wheel the raised resistance can quickly be felt. It is not a malfunction sign, and is connected with some decrease in giving of the pump of the hydraulic booster.

Check of a condition of the hydraulic booster

Fig. 5.5. Check of a deflection of a belt of a drive of the pump of the hydraulic booster

Check up a deflection of a belt of a drive of the pump of the hydraulic booster, having pressed it with effort 98 Н (10 кгс) in a place specified by an arrow on fig. 5.5.

The deflection of a belt of a drive of the pump of the hydraulic booster should be 6–9 mm.

At discrepancy of a deflection of a belt to the specified limits adjust a belt tension, as set forth below.

Fig. 5.6. A bolt of adjustment of a tension of a belt of a drive of the pump

Ослабьте an inhaling of a bolt of adjustment of a tension of a belt of a drive of the pump (fig. 5.6).

Fig. 5.7. Adjustment of a tension of a belt of a drive of the pump

Insert the suitable lever between an arm and the pump, adjust a tension of a belt to the necessary size turn of the case of the pump (fig. 5.7).

Tighten an adjusting bolt.

Check up a tension of a belt and if necessary repeat adjustment.

THE PREVENTION

Turn a belt of a drive of the pump in a normal direction some times and once again check up a belt deflection.

Check of level of a liquid in a hydraulic booster tank

Establish the car on an equal horizontal platform.

Start up the engine. On the motionless car some times without breaks turn a steering wheel to the right-to the left for warming up of a working liquid to temperature 50–60 °С.

At engine work idling some times turn a steering wheel from an emphasis against the stop.

Fig. 5.8. A hydraulic booster tank

Be convinced of absence of foaming or liquid turbidity in a tank (fig. 5.8).

Stop the engine and check up a difference of level of a liquid in a tank at the stopped and working engine.

If liquid level has changed not less than on 5 mm, again pump over hydraulic booster system.

If liquid level sharply raises after an engine stop, again pump over system.

THE NOTE

Incomplete removal of air causes jingling noise of the pump, raised шумность works of the distributor and are reduced by pump service life.

Replacement of a working liquid of the hydraulic booster

Lift a forward part of the car before posting of wheels and establish on supports.

Disconnect a drain hose from a tank of a hydrodrive and muffle a tank aperture.

Attach to a drain hose a vinyl hose and lower its end in the prepared capacity.

Disconnect a high-voltage wire from the ignition coil.

Merge a liquid from system, some times having switched on and off a starter and turning a steering wheel in both parties against the stop.

Attach to a tank a drain hose and reliably fix its collar.

THE NOTE

The volume of liquid PSF-3 for system refuelling makes 0,75–0,8 l.

Fill in in a tank of the hydraulic booster a liquid of the demanded mark.

Start up the engine.

Be convinced of absence подтекания liquids through hose connection, stop the engine.

Add a liquid to the bottom part of the filter of a tank of the hydraulic booster.

Remove air from system.

Removal of air from hydraulic booster system

Disconnect a high-voltage wire from the ignition coil. Switching on and off a starter during 15–20 with, five-six times turn a steering wheel from an emphasis against the stop.

If prorolling is spent at engine work idling, air will get to a liquid. Therefore carry out prorolling only at прокручивании the engine a starter.

THE NOTE

During prorolling add a liquid in a tank so that its level did not fall below the filter.

Attach a high-voltage wire to the coil of ignition and start up the engine idling.

Turn a steering wheel until in a liquid in a tank there will be no air vials.

Fig. 5.9. Level labels on the case of a tank of the hydraulic booster

Be convinced that the liquid did not become dairy colour, and its level is between labels "MOVE" and «MIN» on a tank wall (fig. 5.9).

Be convinced that liquid level in a tank slightly varies at steering wheel turn in both parties.

Repeat system prorolling:

– If liquid level has changed more than on 10 mm;

– If liquid level sharply raises at an engine stop.

Check of pressure of forcing of the pump of the hydraulic booster

Fig. 5.10. The scheme of connections at check of pressure of forcing of the pump of the hydraulic booster: 1 – a control manometre (09572-21000); 2 – the thermometer; 3 – an adapter (09572-22100); 4 – a tank; 5 – an adapter of a manometre (09572-21200); 6 – the steering mechanism

Disconnect from the pump a high pressure hose. Attach to the pump and a hose of a high pressure the adaptation for pressure check, as is shown in fig. 5.10.

Pump over system, then start up the engine and warm up a working liquid to working temperature (approximately 50–60 °С), some times having turned a steering wheel.

Increase frequency of rotation of a cranked shaft to (1000±100) mines-1.

Close the crane of a manometre and check up conformity of pressure of a liquid to the specified limits.

Pressure of forcing of the pump of the hydraulic booster 8,3–8,8 МПа (85–90 kgs/sm2).

THE PREVENTION

It is supposed to close the crane of a manometre for the period of no more 10 with.

If pressure does not keep within the specified limits, repair the pump.

Remove control adaptations and attach to the pump a hose high davle-nija, tighten the union the moment 55–65 Н·м.